Aet of hep airing etjbnace-booi s



UNITED STATES PATENT onirica.

BENJAMIN GOLD, OFl HOBART, INDIANA.

ART REPA'IRING FURNACE-ROOFS.

Application led April 11, 1919. Serial No. 289,338.

To all 107mm t may concern:

Be it'known that I, BENJAMIN GOLD, a subject of the King of GreatBritain, residing at Hobart, in the county of Lake and State of Indiana,have invented a new and useful Improvement in the Art of RepairingFurnace-Roofs, of which the following is a specification.

As a preface to the description of my invention, it may be stated thatin the ofperation of furnaces, as, for example, openhea-rth furnaces,the heat to which the roofs thereof are subjected sooner or late-r burnsout portions of the roof structure, requiring the repairing thereof.Sometimes the burned out portion extends entirely through the uppersurface of the roof, and sometimes short thereof, and, in the repairingoperation, the impaired portion of the roof is eut out and back to apoint where the roof is thickest. Centerin'g is then placed adjacent tothe opening to be filled and the repairing material, as, for example,refractory bricks, are filled into the opening upon the centering, it.being understood that such repairs are made as soon as possible afterthe furnace has ceased to be fired.

My primary object is to provide improvements in the art referred towhereby the labor cost of repairing the roof will be very greatlyreduced, a great saving in time and material will be effected, and, ingeneral, a better j ob result, the brick-layer will be protected fromthe heat of the furnace, which may be relatively great during therepairing operation, the repairs may be made while the furnace is veryhot compared with the heat of the furnace when repaired in accordancewith prior methods; and the spalling off of the bricks 4will beprevented.

Referring to the accompanying drawings, Figure 1 is a cross-sectionalview of a furnace structure illustrating it in the process of beingrepaired in accordance with my invention, the section being taken at theline 1 1 on Fig. 2 and viewed in the direction of the arrow. Fig. 2 isan enlarged section taken at the line 2-2 on F ig. 1 and viewe-d in thedirection of the arrow. Fig. 3 is a perspective view, with parts brokenaway, of one of the similar hanger units illustrated in Figs. 1 and 2,Showing the parts in disassembled relation. Fig. 4 is a plan view of thelower cross-bar of the unit, and the locking rod for holding it at oneend, the

latter being shown in an intermediate posi- Y tion. Fig. 5 is a viewlike Fig. 1 showing a modification of -thehanger unitsthe vsection beingtaken at the line '5-5 on Fig. 6 Iand viewed in the direction ofthearrows; and Fig. 6, an enlarged section taken at the line 6 6 on Fig. 5and viewed in the direction of the arrows. l i

Referring particularly to Figs. 1 to; 4, in-

elusive, a furnace, the roof of which is to be l..

repaired, is represented at'?, the roof being indicated at 8 and shownof arched form transversely yof the furnacev structure. :The

dotted line 9 represents, by way of example,

the inside lof the roof where it is partly burned out and is to berepaired, the roof a-t this point, in accor-dance with common practicebeing removed to provide the rectangular-shaped opening 10 forming ,the

void to be filled, for effecting the repair.

This being done, the operator positions in the opening 10, andpreferably in spaced relation, hanger units which are supported from theroof at opposite sides of the opening, by resting upon the upper surfaceof the roof, and present a support for a plate or plates 'by preferenceofmetal, which form a centering and extends to a point adjacent theunderside of the roof 8. lThe centering thus provided forms a supportupon which the bricks, or other material, for filling the opening. 10are placed. i

The hanger units above referred to, and in accordance with the showingin Figsl to 4, inclusive, are `each formed of a pair of side-bars 11 and12 provided at their upper ends with outwardly-extending anges 13 and14, respectively, and with a lower crossbar 15,` which is pivotallyconnected to the lower end of the bar 11, as by means of the hinge joint16, and -at its opposite end Iis connected indirectly with Athe bar12through the medium of a rod 17 rotatably mounted in bearings 18 and 19secured tothe bar 12, the lower end of the rod 17 being provided with a.cross-piece 20 whichv is adapted in one position of the rodk 17 to beinserted where itis thus provided the bar l1 is preferably equipped withlribs or lugs 22 Yspaced apart vertically on itsv outer `face where itVopposes a wall of the opening 10.

In the repairing of` thev furnace Vroof as 't'roduced vinto vthe opening10 from the top of the roof 8 to a position in which these units rest attheir flanges 13 and 14- upon the portions of the roof surrounding theopening l'Oas'illustrated. The workman Vthen lays across the cross-bars15, to form the centering hereinbefore'referred to, a plate or plates,preferably ofniet-all, such a plate being'representedat 23 and therepairing material filled iiito the opening" 150, as'hcreinbcforestated, in the particular arrangement now being "described,I Vthe hangerunits being removable, after the repairing job has been completed.v Thisis accomplished by the workman rotating' the rods 17 to cause thecross-members QO'to register with the openings 21", afs shown in Fig.il, which permits the cross-bars 15 to swing downwardly von their hinges1G7 the centering 2 3 dropping into the furnace, the bars 11, with theAcrossrnembers 15 hanging from them then being liftednpwardly throughthe roof, and, liliewise, the part l12, with the rods 17 thereon. 'lhear angement'shown in- Figs. 5' and 6 constitutesv` a change in thehanger units onlyfthese units represented' at '2i being formed asVintegral structures instead of separable parts, as in the constructionof the preceding'fig'ures. In this arrangement,the hangers'and centeringwould remain in the roof until burned'ai'vay.

"It will be noted from the foregoing that the workmen in repairing theroof. are stationed atV all-l timesexteri'or of the furnacechamber andthat the centering serves a shieldfto protect the worlimenvagainst theheat of the furnace. i'

Furthermore, by repairing a furnace in accordance with' my invention therepairs may lbe 'effected very 'expeditiously and while the furnace isrrelatively hot,v especially be'- cause of the fact that the hangerunitsl may be quickly applied, tooperative position in the opening rto;be filled with the repair inateria'l, thereby saving'fthe time of theworkmen' and ,minimizing the time during which the furnace is idl e,withconsequentsaving in expense of'labor and operation.` *The centering,when of metal, also serves the-'useful function of permitting the freshmaterial filled vinto the'opening' 10 to be gradually heated, when thefurnace is ref-fired, vwith the result of preventing spalling yof themate-v rial, and bythe time the centering has melted away, wherel itispermittedto' remain AQqpiefs of this patent :hay be obfainecl vfor fivecents each, by f f wanxmgtonfn. er

in the position shown in the drawings, the repairing material has becomeheated to such a degree that spalling will not thereafter take place.

' Furthermore, by supporting thel hanger units as by the flanges 13 andlll resting upon theupper surface of the roof, these units arel causedto take positions substantially conforming to the curvature of the uppersurface of the arched roof, the center'- ing thereby also becomingarched, as shown in" Figs. 1` and 5, wherebythe repairing lua- A terial7when inr brick for-in, willy substantiall y conform at its upper andlower surfaces with the arc-shaped top and bottom surfaces ofthe roof'and thus produce-v a` neat job.

What Iregard as new and desire to secure by Letters patent is-a 1.-' Themethod of repairing furnace-roofs which consists'in introducing from thetop of the roof into the opening" to be filled to extend across theopening and be supported on: the upper surface ofv the roof at theopposite sides of the' opening, hanger-units in a condition in whichtheyform supports for centering, and thereupon introducing into saidopening andfupon said centering the material for iillingsaid opening.

2. The method of repairing furnace roofs which consists in introducingfrom thetop ofthe roof into the lopeningv to bek filled' to extendacross theA opening and be' supported on the upper surface 'of the roofat the opposite sides. of the opening, hanger-units in a condition inwhich they form supports for centering, applying` centering to thehangerunits and thereafter introducing into said opening and upon saidcentering the material for lillingsaid openino'.

3. A hanger comprising a pair of bars, a cross-bar, said bars havingportions at which they are adapted` tobe supported at the edge ofanopening in a roof,A said cross-bar being flexibly connected at one endwith the lower end of one of the bars of said pair of bars, and meansfor releasably connecting said cross-bar at its opposite end with thelower end of the other bar of said pair thereof.

t .4. hanger comprising a pair of bars, a cross -ba'r, lsaid lbarshaving portions at which they are adapted to be supported at the edgesof an opening in a roof to beV ropaired, said cross-bar being connectedat oneend with the lower end of one of the bars of said pair of bars,and means for releasably connecting said cross-bar at its opposite endwith the lower end of the other bar of said pair of bars, said meansextending to a point adjacent the upper end of the adjacent bar forvoperation to release said cross-bar.

" BENJAMIN GOLD.

addressing the Gomm'issioner of Patents.

